Aten group

The Aten group is one of the three groups of near-Earth
asteroids. The Atens have semimajor axes less than 1.0 AU and aphelia greater than 0.983
AU, so that they orbit mostly inside Earth's orbit. The prototype for the
group, 2062 Aten, was discovered in 1976 by the American astronomer Eleanor
Helin, has a diameter of less than 1 kilometer, and is of type
S.

Apoheles, whose orbits lie entirely within that
of the Earth, form a subgroup of the Atens.